55868280 has 128 divisors (see below), whose sum is σ = 183859200. Its totient is φ = 13496832.

The previous prime is 55868279. The next prime is 55868291. The reversal of 55868280 is 8286855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91737 + ... + 92343.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^55868280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55868280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91929600).

55868280 is an abundant number, since it is smaller than the sum of its proper divisors (127990920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55868280 is a wasteful number, since it uses less digits than its factorization.

55868280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 55868280 is about 7474.5086795053. The cubic root of 55868280 is about 382.2860352313.

The spelling of 55868280 in words is "fifty-five million, eight hundred sixty-eight thousand, two hundred eighty".